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Diffstat (limited to 'drivers/dax/super.c')
-rw-r--r--drivers/dax/super.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index ebf43f531ada..922d0823f8ec 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -44,6 +44,7 @@ void dax_read_unlock(int id)
}
EXPORT_SYMBOL_GPL(dax_read_unlock);
+#ifdef CONFIG_BLOCK
int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size,
pgoff_t *pgoff)
{
@@ -112,6 +113,7 @@ int __bdev_dax_supported(struct super_block *sb, int blocksize)
return 0;
}
EXPORT_SYMBOL_GPL(__bdev_dax_supported);
+#endif
/**
* struct dax_device - anchor object for dax services
@@ -208,9 +210,12 @@ EXPORT_SYMBOL_GPL(kill_dax);
static struct inode *dax_alloc_inode(struct super_block *sb)
{
struct dax_device *dax_dev;
+ struct inode *inode;
dax_dev = kmem_cache_alloc(dax_cache, GFP_KERNEL);
- return &dax_dev->inode;
+ inode = &dax_dev->inode;
+ inode->i_rdev = 0;
+ return inode;
}
static struct dax_device *to_dax_dev(struct inode *inode)
@@ -225,7 +230,8 @@ static void dax_i_callback(struct rcu_head *head)
kfree(dax_dev->host);
dax_dev->host = NULL;
- ida_simple_remove(&dax_minor_ida, MINOR(inode->i_rdev));
+ if (inode->i_rdev)
+ ida_simple_remove(&dax_minor_ida, MINOR(inode->i_rdev));
kmem_cache_free(dax_cache, dax_dev);
}
@@ -421,6 +427,7 @@ static void init_once(void *_dax_dev)
struct dax_device *dax_dev = _dax_dev;
struct inode *inode = &dax_dev->inode;
+ memset(dax_dev, 0, sizeof(*dax_dev));
inode_init_once(inode);
}